(Identical to ASTM Specification A /A M (R) except for deletion of , revision of Table 1 footnote A, and editorial corrections to Table 2.) 1. A Class B Stressproof TG&P Cold Finished Bar Round Turned Ground Polished, A Round Bar, A Rod, A TG&P Rod, A TG&P Round Rod . See the chemical composition and physical properties of ASTM A Grade cold-drawn, stress relieved, annealed bar, find alternative materials, and.

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If this test indicates stresses are out of specification, the die is not used. Seams deeper than this are rejectable. Routine warpage tests are also conducted throughout the life a31 the die. This specification covers cold-drawn, stress-relieved carbon steel bars subject to mechanical property requirements.

A311 Class B Stressproof TG&P

a3111 Click below to make an inquiry. The steel shall be made by one or more of the following primary processes: The primary melting may incorporate separate degassing or re? This abstract is a brief summary of the referenced standard. Ast, “as drawn” finish is smooth, Accurate and dark in color. Seams deeper than that stated above are rejected. The values stated in each system are not exact equivalents, therefore, each system must be used independently of the other.

The results then become an integral part of the quality assurance program. Class B are heavy-draft cold-drawn and stress-relieved rounds and hexagons. To learn more about StressProof or any of our specialty products, please contact us. Materials and Manufacture 6. The rating of the inclusion count should also be agreed upon and be based upon examination at a magni?

The importance of high temperature stress relieving to obtain maximum ductility, minimum warpage and excellent machinability is a major part of the original patent.

A Class B Stressproof TG&P | Alro Steel

The degree of restriction and the number of elements so restricted are both subject to agreement between the manufacturer and xstm purchaser. If restraightened, then the same number of tests are again required. Warpage tests are also regularly made as part of a standard quality assurance procedure.


This was followed by the highest temperature stress relieving treatment possible to obtain a combination of properties, including strength, wear resistance, minimum warpage and excellent machinability. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application.

Niagara Lasalle Steel Products – Stressproof ┬«, ASTM A, Cold Rolled Steel Round Rod

The result is s311 steel bar product that meets stringent standards and provides a wide variety of benefits, including:. Therefore, a warpage test is always performed on the first bar drawn through either a new or reground die. The area of the sample to be examined should be agreed upon astn the purchaser and the manufacturer, and the test specimen should be hardened by heating and quenched before being polished to avoid pits.

Have questions about your specific products? To further improve quality, Niagara LaSalle reduced the standard seam depth tolerance for StressProof from 0. One class, B, is cold a3111 with higher than normal heavy drafts to provide higher strength levels, and four grades provide improved machinability. Where secondary melting is employed, the heat shall be de?

Referenced Documents stresses, and then cooling slowly enough to minimize the development of new residual stresses. Every asstm is inspected for surface defects with a magnetic or roto bar tester. The bars are furnished in two classes, A and B.


Niagara LaSalle developed this groundbreaking process in and forever changed the economics of part production. Nonmetallic Inclusion Requirements Microscopical S4. The heavy draft stress-relieved Class B came into existence with the release of the specification. Restricted Incidental Elements S2. Within the text, the SI units satm shown in brackets. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

Mechanical property testing is always the final asstm after all processing is completed. A lot shall consist of bars of the same size from the same heat which have been stress relieved in the same stationary furnace charge. Although it also can be induction hardened, it should be watched for quench cracks. Details of these requirements shall be agreed upon between the manufacturer and the purchaser.


The cast or heat analysis shall conform to the chemical composition requirements specified. Combining values from the two systems may result in nonconformance with the specification.

Workmanship, Finish, and Appearance Historical Version s – view previous versions of standard. The report shall include the name of the manufacturer, ASTM designation and year date and revision letter, if any, class and grade, heat number, size, and grain size if requested.

Within the limits of good manufacturing and inspection practices, the bars shall be free of injurious w311, laps, segregation, or other imperfections that, due to their nature, degree, or extent, will interfere with the use of the material in machining or fabrication of suitable parts.

Combining values from the two systems may result in nonconformance awtm the speci? Within the text, the SI units are shown in brackets. Ground and Polished with special close tolerances available on order.

The yield strength shall be determined at 0. A3111 Cast or Heat Analysis the surface of the material. Niagara LaSalle is exceptionally responsive to the needs of our customers and puts a high priority on providing uniformity in the machinability of our products in order to improve productivity for you. An optical comparator test is made of a mold from each new or reground die measuring the internal geometry of the die.

You can rely on Niagara LaSalle for all of your steel bar needs.

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